Grizzly bar



Sept. 6, 1932. 1 SYMONS 1,876,034

GRIZZLY BAR Filed Deo. 17, 1930 4 Sheets-Sheet 1 LQ w L. G. SYMONS Sept. 6, 1932.

GRIZZLY' BAR Filed Deo. 17, l950 4 Sheets-Sheet 2 fW/ZW Jaffe?? y//z/y v Jiffy/224542 ff @C F Sept. 6, 1932. 4L.. G. sYMoNs GRI Z ZLY BAR Filed Dec. 17, 1930 4 Sheets-Shes??l 5 L. G. SYMONS GRI ZZLY BAR Filed Deo. 1'7, 1930 '4 Sheets-Sheet 4 ffii/5yd sept. 6,193?.v

Patented Sept. 6, 1932 UNITED STATES PAT ENT' OFFICE LOREN G. SYMONS, OF HOLLYWOOD, CALIFORNIA, ASSIGNOR TO SYMONS 'BROIIIELlztVSl DE- VELOPMENT COMPANY, OIE HOLLYWOOD, OALIFORNIA, A CORPORATION OF DELA- VJARE GRIZZLY BAR `Application filed December 1 This invention relates to separating bars for Aemployment with a separating deck in which bars with inter-penetrating arms and fingers are oscillated about parallel axes, and means are provided for causing movement of the material tobe separated across the bars. One object is the provision of a separating member which shall be resistant to wear and to impact. Another object is the provision of such a member which shall be adapted to support particles above aV prede.- termined size at a levelg above the apertures defined by the opposed bars and Atheir arms and ngers. Y n

1.5 Other objects will appear fromtime to time in the course of the specifica-tion and claims. Y

I illustrate my invention more orvless diagrammatically in the accompanying drawings, wherein- Figure 1 is a plan view; l l

Figure 2 is a partial plan view on an enlarged scale illustrating the bars `in greater detail; v

Figure 3 is a partial side elevation; s

Figure Il is a section on the line 4-4 of vFigure 3;

Figure Figure 2. Y l f Like parts are indicatedV by like symbols throughout the specification and drawings'. Referring to the drawings, A generally indicates any suitable frame member, of which I show the side channel members A1 A2 which may be connected as by the transverse end members A3. In order to support the frame and screen lat any desired angle, I may provide supporting abutments or brackets At. ,n

Mounted upon the .upperv flange of each channel A1 A2 are a plurality of boxes or housings, each formed by opposed angles B B1, as shown for example in Figure 3 the top being closed by a cover plate B2. Positionedl wi hin `the l general rectangular 5 is a section on the line 5-5 -of 7, 1930. serial No. 502,914.

aperture so formed is a rectangular bushing or block B3 of rubber which is provided with a central aperture B4 herein shown as rectangular also. It will be clear, as from Figures and 4, that both the block itself and the rectangular aperture are oblong or elongated with a long diameter generally perpendicular to the side frame member A1 or A2. The block B3 is preferably surroundedby a metal coveringmember B5 overturned at the sides as at B6 to prevent any undue lateral expansion of the block B3.V The member B5 is split and the opposed edges are spaced slightly apart as at B7. The cover plate B2 is provided with centering ears B8 between which passes a ,securing bolt B?, the ends of which pass through corresponding apertures in the angles B B1, in which apertures are"` seated cone shaped bushingspBlO. The assembly is .drawn together as by the nut B11. The tapered bushlings Blohave some wedging actionandlserve to seat the cover plate B2 firmly against the top of the rubber block B3 and to maintain said block under a desired predetermined compression.

It will be understood that'the blocksB` are Aarranged in parallel or in definitely spaced Yrelation along the opposite frame members.V Threaded `through each opposite pair of said blocks are separating bars. Each such bar ,includes a central barG, the ends ofv which are'upwardly built up as at C1. the upwardly built up portion seats inthe aperture B4 of the rubber block B3. In each end of each bar is a socket or aperture C2 which may receive a ball C3 opposed to an adjustablel abutment C4 in a bracket C5, which may for example Vbewelded to the upper flange of the channel member A1 or A2. The abutment C4 is herein shown as screwthreaded in said bracket C5 ,and is provided with an apertured disc C? through rwhich may be passed Ya cotter G7 which may bracketC5and thus prevent rotation of the The end with penetrate the v member C4 and thus hold it in any desired adjusted position. It will be noted that the center of rotation or oscillation of the bar C, as generally defined by the ball C3, is midway of top and bottom of the built up end portion of the bar.

Laterally projecting from opposite sides of each bar C are aligned arms D, the arms being provided with laterally extending fingers D1. It will be seen as in Figure 2 that the armsA D are generally. perpendicular to the bars C and'that the fingers D1 are generally parallel with the bars C. The junction of arms and bars and of fingers and arms may be provided with fillets as v'at D2, if desired. The upper surfaces fingers are in general parallelism and are substantially below the top s of the built up portions of the ends ofthe bars as at C1.v In

fact, the center of oscillation, as defined `by the ball C3, lis adjacent or, in the particular embodiment shown, only slightly below the effective upper surface of bars, arms and fingers. If desired, the bars may be formed of a softer or less resistant material than the 'arms `and fingers. For example, manganese 'steel 'arms may be welded to the bars, in such case the arms including a Vstirrupportion D? passing about the bottom of the bar C and joining the arms D onopposite sides'of the bar. The bars may also be providedwith bottomreinforcing members D4 from which laterally` extend finger reinforcing members D5. It will be seen as from Figures l and 2 that the arms extending laterally from acent bars inter-penetrate, and that'the fingers of adjacent arms inter-penetrate in such fashion that a pervious separating bedis pro- .Vided witha plurality of apertures; In the Vform of the device herein shown these apertures are uniformly distributed and are of uniform size, Vbut a slight variation in ``size, shape and distributionmay be vgiven separating bed if necessary. y

Referring for exampleto Figures 1 and 2 it will be seen that extending longitudinally ofthe separating bed, and aligned along the upperv surface of the various arms, are upwardly extending ridges E. The ridge for Aeach pairgof arms extends froml theend.` of

'one arm across the bar vand'to the end of the opposite arm. The aligned portion of the next bar is provided between' its arms with a corresponding ridge portion El, whereby in effect a plurality of continuous ridges extend from end to end ofthe separating bed, having foreffect to support a larger or the flatter piecesslightly above the surface of the sepa'- r'ating bed. Along the end arms of each bar is an even higher terminal or boundary ridge E2 within which depends a preferably flexible wall member Es which maybe mounted on any suitable brackets or supports E4,

whichin turnare secured to one of the side members A1 or A2. The bracketsmay carry of bars, arms and j made in av a longitudinally extending plate or plates E5 to which the flexible member E3 may be bolted or otherwise secured. The brackets E4 may be adjusted as by the Slots E6 through which pass any suitable securing mem-bers E7. On the end bars of the bed, as shown in Figure l, only inwardly projecting fingers need be used, so that the ends of the bed are actually defined by bars and not by outwardly projecting fingers. j

In order to impart to the bars an oscillating movement, I provide a longitudinal rocker arm extending along one or both sides of the separating bed. I illustrate it herein only along'pone side of the bed as normal use a single rocker arm is sufficient, but it will be understood that if necessary a corresponding and substantially identical arm may be positioned alongthe opposite side of the bed. I illustrate for example an arm including a channel G having abottom portion G1 and upwardly extending side portions or flanges G2. Extending 'acrosssaid arm between the side flanges G2are a plurality of tubes or cylinders G3, one for each 'bar to be oscillated. Surrounding each said cylinder G3 is a bushing G4 preferably of'rubber or some suitable yelding material. Clamped about said bushing and connecting it with the corresponding bar tobeoscillated is an arm generallyindicated as G5 which includes opposite parts G-GF, such parts being clamped or secured together about the outwardly-extending enlarged portion ofthe shaft and about said bushing. To'conn'ect the membersG6 to the bar, Iv may provi-de an upper securing bolt G7 which passes through the enlarged end portion ,of the bar; and lower securing Vbolt Gr8 which passesbeneath it.V At thelower end of the members G6, I `may provide a single securing bolt G9 with its securing nut Glo 'which draws together about the bushing Gr4 the :arcuate clamping 'elements G11.- It will be understood thatvthe pressure uponthe bushing G4L y be v'ar'iedo'r afdjusted,as by varying the thickness of number of the shims G12 as `4shown in Figure 3. It will beunder-` stood that the parts are so drawn up or secured that the rubber bushing G4 is held against rotation tothe cylinder G3 and is also held against rotation -in relation tothe surrounding members yG11 of the armr G5. In other words, :relative movement' ofthe parts causing Vinternal torsion fof the rubber and lrelative rotation or movement of opposed 'abutting surfaces oflrubber Vand metal.

In orderto movethebarG as a whole,'I provide 'the below described connection, namely a bar of opposed and generally tri'- angular plates H H'wh-ich depend from the vbar Gas shown i-n VFigures 3 and 4. These asat H? to `receive the tubelor cylinder H3. AThis-cylinder in turn Vv1,876,0323A has about it the rubber lbushing `Hi about which are clamped the opposed arcuate stirrups H5 HG at the end of an actuating eccentric arm below described. H7 are any suitable bolts with the nuts HS, whereby the pressure about the bushing H4 may be adjusted, as for example through the shims H9. The structure above described may be seated upon the tapered end I 11 of the eccentric arm H10, to which it may be secured as by the nut H12. It will be notedy that the nut H12 is mounted with a separate member H13 through which passthe ends of the bolts H7 and which abuts against the member H5, being separated from it for example by additional adjusting shims 1&14

I may employ any suitable means for actuating the arm H1". But since the details of such actuating means do not of themselves form part of the present invention they are not described in detail.

It will be realized that whereas I have described and shown a practical and operative means for carrying out my invention, that nevertheless many changes in size, shape, number and disposition of parts may be made, and that my process may be carried out with a variety of different structures. I wish my description and drawings to be taken, therefore, as in abroad sense diagrammatic or illustrative, rather than as limiting me to my precise showing herein.

The use and operation of my invention are as follows:

I maintain a separating bed or zone of separation wherein opposed bounding walls of individual screening apertures are given a positively controlled and limited differential movement, along lines or directions generally perpendicular to the plane of the bed or zone. I maintain a movement of relatively short excursion and of relatively high velocity, my experience being'that a slow movement and a long travel causes grinding rather than clean cut separating vor screening. When I employ a short travel and high frequency, the particles are not ground,4 but either pass through the apertures or are else kicked out. A particle may not go through an aperture unless it is small enough to fall freely through the aperture. If it barely lits an aperture, in such a way that grinding will result, it is immediately kicked out and goes on to try the next hole and, if even slightly oversize, passes entirely across the separating zone.

The zone is formed by a series of screen bars having interpenetrating arms and fingers, as herein shown'. Each individual bar is oscillated about a pivot or axis, all the bars being oscillated in alike rotational direction. The result is that the opposed arms and fingers of adjacent bars are continually moving in opposite directions, except at `the time 'of the dead points `of change of direction. Also, while the arc of travel of each arm increases outwardly from its central rotation, the relation between the opposed walls of adjacent arms and fingers of different bars is always the same because the maximum Vtravel at theend of one bar takes place adjacent the minimum travel of the adjacent bar or arm, and the relative movement between opposed sides of the individual apertures is uniform.

I/Vhen I wish to separate material having particles with a wide range in size, for example when a mass of larger particles or fragments, mixed with lines, is to be separated, a large particle, for example, a flat fragment, if it slides along the surface of the bed, might temporarily blind many of the apertures. I therefore provide means for spacing these excess 'oversize particles upwardly awayfrom the screen surface. Hence the ridges E, El which extend longitudinally from end to end of the separating bed and which project upwardly above the normal surface of the tops of bars, arms and fingers. These ridges carry the big particles as they travel along the screen and space them upwardly away from the screen openings so that the small particles which sift down to the bottom of the mixed mass are screened out or separated without even a temporary blinding ofthe separating apertures; Conventional screening, with a screen body vibrated as a unit, raises and lowers the entire sheet of material being screened, causing the entire mass to travel by jerks. In my present separating bed theupward propelling force is not directed against the entire lmass simultaneously, but against individual particles, or individual groups of particles. As a result, something of the effect of an air separator is obtained, and it is unnecessary bodily to displace the entire mass. As the arms and fingers on one side of each rod rise, the arms `and fingers on the oppositel side drop. The very coarse material being, in effect, screened out by the above mentioned ridges, the fines have free access to theseparating apertures, and pass therethrough. As a result a very complete segregation of the fines from a bodyof particles ofmixed' sizes l115 may take place without a preliminary coarse i screening and without preliminary separation or removal of the larger particles. In effect the result both of a bar grizzly and of an attendant or following screen is obtained and my bed orV zone of separation'maintains inl effect two separate screening planes, both in the same material bed or zone of separation and both carried by and oscillated by the same supporting and `actuating mechanism. For example, in feeding mixed materials to a cone crusher, it may be desirable to crush particles of diameters ashigh as nine inches or more.y Assume that such materials have to be 4crushed to a size say of one inch, butl are accompanied by a substantial volume of particles already reduced to a size of one inch or less. I may pass the mixed materials over a separating bed the diameters ofthe apertures of which are, say, one inch. These apertures will permit the undersized material to escape, while all material above one inch will pass over the separating bed, and may be conveyed tothe Crusher. Not only will my separatingbed screen out the lines, but it will support the impact and weight of the large boulders from which the fines are separated.V I may freely feed heavy jagged rocks to my bed, and separate the fines. I may, for example, employ bars of `manganese steel, which bars will efficiently resist deformation or breakage, and which will have a long life of wear. If ordinary screen clothwere employed, the hea jagged boulders would quickly batter the mesh to pieces.

In connection with the structure employed, I provide practically unbreakable means for not only spacing the larger particles away from,` the separation zone of the bed, but from preventing them. from damaging the separating members. The manganese steel barsv and fingers are as eective as or more effective in separation than screen cloth, and can resist the punishment of large boulders in the way in which screen cloth cannot.V

I claim: p y *e l. In a separating bar, a longitudinally extending' bar member, arms rextending laterally from opposite sides of saidA bar, fingers laterally extending from opposite sides of the arms, and ridges upwardly extending along the topsv of the arms, the tops of the ridges, and the upper faces of the arms, defining generally parallel planes, the arms alongv opposite sides of the bars beinO in line, the lingers o-f adjacent arms and o opposite sides of the same arm being aligned, and a terminal extension at each end of each said bar, extending outwardly beyond the junction of the outermost arm with the bar, the outermost arm being provided with a flange upwardly extending to a height somewhat greater than the height of the ridges upon the remainingarms, the terminal extensions extending upwardly above the normal plane of the' tops ofthe fingers. 2. In a separa-ting bar, a longitudinally extending bar member, arms extending laterally from opposite sides of said bar, fingers laterally extending from opposite sides of the arms, and ridges upwardly extending along the tops of the arms, the tops of the ridges and the upper faces of the arms, delining generally parallel planes, the arms along opposite sides of the bars vbeing in line, the fingers of adjacent arms and of opposite sides of the same arm being aligned, and .a terminal extension .at each-end of each said bar, extending outwardly ybeyond the junction of the outermost arm with the bar, the .outermost arm being provided with a flange `upwardly extending to a height somewhat greater than the height of the ridges upon the remaining arms.

3. In a kseparating bar, a longitudinally gers laterally extending from opposite sides of the arms, and ridges upwardly extending along the tops of the arms, the tops olf-the ridges, and the upper faces of the arms, defining generally parallel planes, the arms along opposite sides of the bars being in line.

5. In a separating bar, a longitudinally extending' bar member, arms extending laterally from opposite sides'of said bar, fingers laterally extending from opposite sides .of the arms, and ridges upwardly extending .along the tops of the arms, the tops of the ridges, andthe upper faces of the arms delining generally parallel planes.v I

6. Ina separating member adapted foruse in a separating bed, a longitudinally extending bar, a plurality .of arms extending from opposite sides of the bar, and a plurality of fingers extending from opposite sides ofthe arms the upper faces .of bar, armsand fingers defining a single plane, said bar extending outwardly longitudinally beyond said .2l-rms and fingers, said outwardly lextending portion of the .barextending upwardly above .the vnormal plane of the upper faces of bar, arms .and fingers. Y f

7.V In separating bar, a longitudinally vextending bar member, arms extending lat- .erallyfrom opposite sides of said bar member, leach said arm including a web portion and a reinforcingribtherebeneath, of greater depth but of less width vthan such web portion, fingers laterally ,extending fromv opposite sides ofthe arms,the fingers including web portions lying in the plane of the webs of the arms and reinforcing ribs positioned therebeneath and associated with the rein-Y forcing ribs of the arms.`

8. In a separating bar, a longitudinallyl Lextending bar member, arms `extending laterally fr om opposite sides of-said lbarmember, cach said arm including .a web portion yand a reinforcing rib therebeneath, of greater depth but of less width than such web portion, fingers laterally extending from opposite :sides of'the arms, .the fingers including web llO portions lying in the plane of the Webs of the arms and reinforcing ribs positioned therebeneath and associated With the reinforcing ribs of the arms,` and ridges upwardly extending along said arms, the upper surfaces of said ridges defining a plane generally parallel with the plane of the Web portions of fingers and arms.

Signed at Hollywood county of Los Angeles and State o California, this 11th day of December 1930.

LOREN G. SYMONS. 

